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An inductive load draws 5 kW at a power factor of 0.7 from a 240 V, 50-Hz supply. To reduce the kVA demand charge, the consumer decides to connect a capacitor in parallel with the load. Calculate (i) the parallel capacitance C1 that would be required to change the power factor of the total load on the supply to 0.80 lagging and (ii) find the value of the supply current at this power factor
he sensor to be used has a transfer function of ? Q volts, where Q is in gal/min, and an output impedance of 2.0 k?. Tests show that the output of the sensor has 60 Hz noise of 0.8 V rms. Design a signal-conditioning system, including noise filter..
A certain lossless transmission line is terminated in a normalized load impedance of ZL,n = 0.5 j2 ohms. Use a Smith Chart to determine the answers to the following questions. Mark the position of the load impedance on the chart and label it ZL.
What is the function of the enable control input of a tri-state buffer. If the output of two or more tri-state buffers is connected to each other, what is the restriction on enable control input lines.
What is the equivalent input noise resistance of an amplifier known to produce 20 V of equivalent input noise over a bandwidth of 750 kHz
Suppose the suspension system of the average car can be fairly well modeled by an under damped harmonic oscillator with a natural period of 2 seconds. How far apart should speed bumps be placed so that a car traveling at 10 miles per hour
A box of mass 20kg is slid down a ramp inclined at 20 degree with an initial speed of 5 m/s. If the box stops after 10 m, what was the coefficient of kinetic friction between the box and the ramp
Need the coding for the circuits and its a intelligent fan controller based on temperature?
What causes the current gain to decrease both in the case of a low collector current and at a high collector current?
In transformer designs, often you can find an air gap in the core. In all the electric machines, there is an air gap between the stator and rotor. In both cases, flux will go through both core material and the air gap.
Polyethylene with ?_r = 2.25 is used as the insulating material in a lossless coaxial line with a characteristic impedance of 50 Ω. The radius of the inner conductor is 1.2 mm.
Design and model a car battery charger using PSpice. Suppose that the source is a commercial circuit of 240V AC at 60Hz. The battery to recharge is 12V DC.
a) the synchronous generator has a unique ability whihc places it at the top of the heap of all machines that might be used for generation of electric power. This unique capability is what allows the business of electric dispatch to even occur.
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